Best Free Online Plagiarism Checker 2024 List

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Plagiarism involves taking someone else’s work and using it as your own for some kind of gain or advantage. Plagiarism is immoral and wrong. When it comes to web page content, it is also detrimental to SEO (Search Engine Optimization) and how Google will evaluate and rank your content.

An example of plagiarism might be that you choose to use a website that covers the topic you want to cover and then you use ‘copy-and-paste’ to plagiarize that content. and can pass it as its own.

Any piece of content writing online, whether it’s for a website or a blog, it’s always a good idea to check that your writing is unique and isn’t already visible elsewhere online, written by someone else. Equally, if you’re sure that the content you write is unique to you, there’s no harm in checking that your content hasn’t been plagiarized.

What is plagiarism?

Plagiarism is the unethical practice of using another author/researcher’s words or ideas (either planned or accidental) or your own past works without proper acknowledgment. Considered as a serious academic and intellectual crime, plagiarism can result in extremely negative consequences such as paper return and loss of credibility and reputation of the author. This is currently a serious problem in academic publishing and a major reason for the withdrawal of research papers.

This list is still open. If you would like to add your own plagiarism checker tool, please send us your tool information so we will review and let you know feedback.

How does Plagiarism Checker work?

Plagiarism Checker detects and displays plagiarism content. These tools break down your document into smaller pieces and phrases and then search each phrase in a search engine. Such applications scan the Internet for other uses of content or documents to find similar content.

Plagiarism checkers use complex proprietary algorithms to detect similar content in paragraphs, sentences or ideas. If a page contains the same text, the sentence becomes plagiarism. Plagiarism detection software scans documents in real time and provides accurate results.

Best Plagiarism Checker 2024

1. Plagaware 

Plagaware is a professional plagiarism checker for students, universities, writers and SEOs. Apart from checking for plagiarism, the tool also supports continuous monitoring of texts to prevent online plagiarism of website content. PlagAware is free for short text and websites, but it also comes with a paid plan and business support.

2. Duplicate checker

One well known free tool is Duplicate. This tool is great because it includes automation related to other content such as checking spelling and grammar. Its easy to use. Simply upload your content or copy-paste it in the text box provided by them.

There’s a short wait from there to get the check results – you don’t need to enter an email or create an account. There is a 1000 word limit per search, but that’s not a big problem.

An easy, intuitive and free plagiarism checker that works

3. Plagiarism Checker X

Plagiarism Checker X is an easy to use accurate plagiarism scanner. It is one of the best plagiarism checkers for research papers that allows you to easily compare content in bulk.


  • It is one of the best plagiarism checker for research papers which can detect plagiarism information through multiple search engines.
  • The app allows you to compare the content without any hassle.
  • Plagiarism Checker X keeps your data private.
  • It allows you to import DOCX, DOC, PDF, HTML and RTF.
  • This application supports multi-language including English, French, Spanish, Italian and others.
  • You can get color-coded density-based results.
  • Provides 24/7 support.

4. Plagiarism is a trusted plagiarism checker tool focused on helping teachers, students, online content creators.

This is extremely useful if you want to review your own submission for plagiarism (unintentional plagiarism) before submitting it to your college professor or content authority.

After you upload your writing, Plagiarism Checker regularly scans and matches your content with an updated database

5. Copyleaks

This cloud-based authentication platform enables you to track how e-learning content is being accessed on the Internet.


  • for education and business
  • Various sections on the platform for educational and business purposes. The business section addresses publishers and SEO agencies, while the education section addresses schools, students, and universities.
  • Multiple file formats and languages
  • CopyLeaks is able to scan content in various file formats and all Unicode languages.
  • variety of equipment
  • CopyLeaks allows you to use API tools to find plagiarized e-learning content across the Internet. It also offers a mobile app with an MS Office add-on, which you can use to check for plagiarism as you are writing a document on MS Word.


  • You can use it only after signing up
  • Unfortunately, in order to search for plagiarized e-learning content, you must first create a free account.
  • free page restrictions
  • Only the first 10 pages are free.

6. Quetext: Best Plagiarism Checker and Citation Assistant

Quetext is what started as a basic duplicate content checker but has now acquired some great features that make it in the top 10 of our list of best plagiarism checkers.

The free version is simple and intuitive where you paste your text on their website and have it matched for duplicate content in a database of web pages and others.

With QText’s DeepSearch feature, you can get your content checked not only against common words but also for pertinent plagiarism. With contextual plagiarism, your sentences in the essay are checked as references to neighboring lines.

This makes it the best plagiarism checker for students to ensure that your essay is error free before submitting.

8. PepeRater 

This plagiarism detection tool acts as an add-on for a content checker, so make sure you have checked the box to include plagiarism checker in web page checkup.

There are a few more buttons to click on, so it may take a little longer than DuplicateChecker, but plagiarism detection is pretty accurate so well worth the wait.

Also included in the search, you’ll find results for spelling mistakes, grammar, what grade your content is in, word selection suggestions, and a few other tabs.

9. PlagScan

PlagScan is more suitable for students, but also works well for online content. The interface is if a bit cluttered and like previous plagiarism scanners, you have to create an account, you do this with a ‘free trial’, but the tool gives you 20 free credits for doing 20 scans.

With adding standard import channel URLs, local files, or plain text, PlagScan keeps this part simple to use. Scans are saved to your account so you can access them whenever you want, along with additional information like word count and dates.

10. Plagium

As a free tool, Plagium works fine. It’s easy to enter your text, and plagiarism results are shown quickly at the bottom of the search. They only search for plagiarized web content, so it would not be usable for academic papers.

Again, this is just a copy and paste type check that doesn’t offer any file formats, so there’s limited functionality, but you get perfectly accurate results for Google’s indexing. You can use their ‘deep search’ tool, but it’s not free.

11. Plagiarism Checker by Editpad

This is yet another free plagiarism detection tool that is highly quick and accurate at detecting plagiarism in written content. It is widely used by students, teachers, bloggers, marketers, and webmasters.

The main reason behind its popularity is that it makes use of advanced AI algorithms that compare the given text with millions of published resources online to find any plagiarism. If any traces are found, it is highlighted with a red line along with the matched source.

One of the amazing things is that it can detect plagiarism in 14 languages. Moreover, it allows users to check up to 1,000 words at once, which is more than enough for free users.

Which are the best plagiarism checker software?

Following are some of the best plagiarism checker software:

  • Plagiarism Checker X
  • Prowriting Aid
  • Grammer
  • copyscape
  • copyleaks
  • plaguescan
  • Yunichek

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What are the Different Types of Plagiarism?

Plagiarism can generally be divided into 5 types. They are as follows:

  • Outright plagiarism: copying someone’s work verbatim (word by word) without giving credit.
  • Self-plagiarism: copying or making an assignment influenced by one’s previous work (also called unintentional plagiarism).
  • Mosaic or patchwork plagiarism: quoting someone else’s work without quotation marks or changing the language (of the original work) while keeping the structure the same.
  • Accidental plagiarism: Inadvertently forgetting to cite the original work, incorrect citations, etc.
  • Outsourcing: Essay mills, friends, hiring article writers, paying bloggers to write on your behalf.

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